Adjustable backrest



FIG. 1 is a top, front and left perspective view of the backrestaccording to our design;

FIG. 2 is a top, rear and left perspective view of the backrestaccording to our design;

FIG. 3 is a front view of the backrest according to our design;

FIG. 4 is a rear view of the backrest according to our design;

FIG. 5 is a left side view of the backrest according to our design, theright side view being a mirror image of the left side view;

FIG. 6 is a top view of the backrest according to our design; and,

FIG. 7 is a bottom view of the backrest according to our design.

The ornamental design for an adjustable backrest, as shown anddescribed.